12 Incredible Limits Humans Can Reach (But You Probably Can’t)

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Now that’s pressure to perform.

You experience 1G of pressure while standing at sea level. On a roller coaster delivering 2Gs, a 150-pound person will feel like they weigh 300 pounds. You'd probably pass out around 5Gs because your heart can't pump enough blood, so it’s really impressive that fighter pilots are trained to handle nearly 10Gs. But that’s nothing compared to Air Force physician John Stapp, who subjected himself to a staggering 46.2 Gs. While that portion of his ride was brief, the forces involved caused the normally 168-pound man to momentarily weigh 7,700 pounds. He lived for another 45 years.